Sex and age interact to determine clinicopathologic differences in Alzheimer’s disease
Open accessAbstract
Women reportedly make up two-thirds of Alzheimer's disease (AD) dementia sufferers. Many estimates regarding AD, however, are based on clinical series lacking autopsy confirmation. The Florida Autopsied Multi-Ethnic (FLAME) cohort was queried for AD cases with a total of 1625 identified ranging in age from 53 to 102 years at death. Standard neuropathologic procedures were employed and clinical information was retrospectively collected. Clinicopathologic and genetic data (MAPT and APOE) were stratified by sex. Within the neuropathologically diagnosed AD cohort, the overall number of women and men did not differ. Men were younger at onset of cognitive symptoms, had a shorter disease duration, and more often had atypical (non-amnestic) clinical presentations. The frequency of autopsy-confirmed AD among women and men stratified by age at death revealed an inverse U-shaped curve in men and a U-shaped curve in women, with both curves having inflections at approximately 70 years of age. Regional counts of neurofibrillary tangles differed in women and men, especially when examined by age intervals. Women had overall greater severity of neurofibrillary tangle counts compared to men, especially in the hippocampus. Men were more often classified as hippocampal sparing AD, whereas limbic predominant AD was more common in women. Men and women did not differ in frequency of MAPT haplotype or APOE genotype. Atypical clinical presentations, younger age at onset and shorter disease duration were more frequent in men, suggesting that the lower reported frequency of AD in men may be due to more frequent atypical clinical presentations not recognized as AD. Our data suggest that neuropathologically diagnosed AD cases have the same frequency of women and men, but their clinical presentations and ages at onset tend to differ.
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Women develop greater neurofibrillary degeneration, brain parenchymal loss, and cognitive decline.
“Recent studies suggest that women develop greater neurofibrillary degeneration, brain parenchymal loss, and cognitive decline.52,53,54”
From Sex differences in cognitive decline among US adults (2021) · cites this paper as [54]
The Discussion (page unavailable) reports more severe hippocampal neurofibrillary tangles in women and cites neuroimaging findings of faster hippocampal atrophy. That supports a regional form of tissue loss, not greater brain-wide parenchymal loss. The Discussion and Results on clinical findings (pages unavailable) explicitly say that the rate of cognitive decline did not differ between women and men. (LLM, conf=0.91)
Experimental — accuracy not yet measuredPost mortem studies indicate that females have lower resistance to AD pathologies.
“Moreover, post mortem studies indicate that females have lower resistance to AD pathologies. 70 , 71”
From Unraveling sex differences in Alzheimer's disease and related endophenotypes with brain proteomes (2025) · cites this paper as [71]
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- Authors
- Liesinger, A. M., Graff-Radford, N. R., Duara, R., Carter, R. E., Hanna Al-Shaikh, F. S., Koga, S., Hinkle, K. M., DiLello, S. K., Johnson, M. F., Aziz, A., Ertekin-Taner, N., Ross, O. A., Dickson, D. W., & Murray, M. E.
- Affiliations
- Mayo Clinic in Florida (US)
- Mount Sinai Medical Center (US)
- Corresponding author
- Murray, Melissa E.
- Venue
- Acta Neuropathologica
- Published
- 2018-09-15
- Volume
- 136
- Issue
- 6
- Pages
- 873-885
- ISSN
- 0001-6322 (ISSN-L)
- 1432-0533
- PMC
- PMC6280837
- OpenAlex
- W2892051921
- Cited by
- 126
- References
- 11
- Citations by year
- 2026: 14 · 2025: 31 · 2024: 14 · 2023: 19 · 2022: 10 · 2021: 16 · 2020: 8 · 2019: 13 · 2018: 1
- FWCI
- 7.48
- Type
- journal article
- Language
- en
- Open access
- hybrid
- doi.org
- Locations
- Acta Neuropathologica (publishedVersion, cc-by)
- Europe PMC (PubMed Central) (publishedVersion, other-oa)
- PubMed Central (publishedVersion, cc-by)
- PubMed (publishedVersion)
- Funders
- Florida Department of Health (6AZ01, 8AZ06)
- National Institute on Aging (R01 AG054449)
- Gerstner Family Foundation (Career Development Award)
- Topics
- Health Sciences › Medicine › Psychiatry and Mental health › Dementia and Cognitive Impairment Research
- Health Sciences › Medicine › Physiology › Alzheimer's disease research and treatments
- Life Sciences › Neuroscience › Neurology › Neuroinflammation and Neurodegeneration Mechanisms
- Keywords
- Alzheimer's disease, sex differences, age at death, clinicopathological correlation, neurofibrillary tangles, atypical presentation, age of onset, disease duration, APOE genotype
- MeSH terms
- Age Factors, Aged, Aged, 80 and over, Aging, Alzheimer Disease, Autopsy, Brain, Female, Humans, Male, Middle Aged, Psychiatric Status Rating Scales, Sex Characteristics, Neurofibrillary Tangles, Statistics, Nonparametric
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